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Finding the Fourth Proportional to 361.96, 499.06 and 305.84

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Solution

The fourth proportional to 361.96, 499.06 and 305.84 is: 421.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.96 : 499.06 = 305.84 : x
  2. Step 2: Convert to fraction form
    361.96/499.06 = 305.84/x
  3. Step 3: Cross multiply
    361.96x = 499.06 × 305.84
  4. Step 4: Simplify right side
    361.96x = 152,632.51
  5. Step 5: Solve for x
    x = 152,632.51/361.96
  6. Step 6: Final answer
    x = 421.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.